RA/DEC (2000)
08:13:00.600 +21:09:10.08
123.2525 +21.1528
Type
TDE-H-He
Redshift
0.179
Discovery ReportClassification Report
Related AstroNotes: 2026-20
Reporting Group
None
Discovering Data Source
WFST
Discovery Date
2025-11-19 22:08:24.000
TNS AT
Y
Public
Y
Host Name
SDSS J081300.64+210909.8
Discovery Mag
21.9937
Filter
g-WFST
Reporter/s
Mingxin Wu (USTC), Ning Jiang (USTC), Shifeng Huang (USTC), Yibo Wang (USTC), Tinggui Wang (USTC), Chengyi Wang (USTC), Jiazheng Zhu (USTC) on behalf of the WFST collaboration
NEDSIMBADDECaLSPanSTARRS-1SkyMapperVizieRWISEDSSADS

Spectra

 ▌TDE_2025alrm - 2026-01-14 00:00:00 MMT / BINOSPEC (None)z=
▌Show H at z=vexp= km/s
▌Show He at z=vexp= km/s
▌Show He II at z=vexp= km/s
▌Show C II at z=vexp= km/s
▌Show C III at z=vexp= km/s
▌Show C IV at z=vexp= km/s
▌Show N II at z=vexp= km/s
▌Show N III at z=vexp= km/s
▌Show N IV at z=vexp= km/s
▌Show N V at z=vexp= km/s
▌Show O at z=vexp= km/s
▌Show [O I] at z=vexp= km/s
▌Show O II at z=vexp= km/s
▌Show [O II] at z=vexp= km/s
▌Show [O III] at z=vexp= km/s
▌Show O V at z=vexp= km/s
▌Show O VI at z=vexp= km/s
▌Show Na at z=vexp= km/s
▌Show Mg at z=vexp= km/s
▌Show Mg II at z=vexp= km/s
▌Show Si II at z=vexp= km/s
▌Show S II at z=vexp= km/s
▌Show Ca II at z=vexp= km/s
▌Show [Ca II] at z=vexp= km/s
▌Show Fe II at z=vexp= km/s
▌Show Fe III at z=vexp= km/s
▌Show Å at z=vexp= km/s
▌Show Å at z=vexp= km/s
▌Show Å at z=vexp= km/s
▌Show Å at z=vexp= km/s
▌Show Tellurics 
▌Show Galaxy lines at z=
▌Show WR-WN at z=vexp= km/s
▌Show WR-WC/O at z=vexp= km/s
   Binning factor: (rounded to nearest integer >1)
Mouse hovers at WL: 0 (rest),0 (observed)

Light curves

 ▌WFST_WFST-WFC_g
 ▌P48_ZTF-Cam_g
   
Pointer position (MJD, Mag, Abs.Mag): (0.00, 0.00, 0.00)
Spectra
 ID Obs-date (UT) Tel / Inst Exp-Time Observer/s Reducer/s Group Spectrum ascii file Spectrum fits file Spec. Type Assoc. Groups End prop. period Remarks
22911 2026-01-14 00:00:00 MMT / BINOSPEC Yibo Wang None tns_2025alrm_2026-01-14_MMT_BINOSPEC_None.txt Object
Light Curves
Filter Tel / Inst Obs-date range JD Range Photometry
g-WFST WFST_WFST-WFC 2025-11-19 22:08:24 - 2025-11-19 22:08:24 2460999.4225 - 2460999.4225 1
Photometry
ID Obs-date JD Mag. / Flux Err Lim. Mag./Flux Units Filter Tel / Inst Exp-time Observer/s Remarks
555750 2025-11-19 22:08:24 2460999.4225 21.9937 ABMag g-WFST WFST_WFST-WFC
g-ZTF P48_ZTF-Cam 2025-11-08 11:06:43 - 2025-11-08 11:06:43 2460987.963 - 2460987.963 1
Photometry
ID Obs-date JD Mag. / Flux Err Lim. Mag./Flux Units Filter Tel / Inst Exp-time Observer/s Remarks
555749 2025-11-08 11:06:43 2460987.963 20.525 ABMag g-ZTF P48_ZTF-Cam [Last non detection]
AT Reports
ID Time received (UT) Sender Reporter/s Reporting group Disc. Data Source RA DEC Discovery date (UT) Discovery Mag. Filter Related files AT Type Host name Internal name Assoc. Groups End prop. period Remarks ADS Bibcode Unreal Auto classification
289921 2026-02-04 13:05:54 Mingxin Wu Mingxin Wu (USTC), Ning Jiang (USTC), Shifeng Huang (USTC) et al. WFST 08:13:00.600 +21:09:10.08 2025-11-19 22:08:24.000 21.9937 g-WFST NUC SDSS J081300.64+210909.8 WFST250129blnve WFST 2026TNSTR.470....1W N
Classification Reports
ID Time received (UT) Sender Classifier/s Group Classification Redshift Spectra Related files Assoc. Groups End prop. period Remarks ADS Bibcode
22910 2026-02-04 16:01:23 Mingxin Wu Mingxin Wu (USTC), Ning Jiang (USTC), Shifeng Huang (USTC), Yibo Wang (USTC), Tinggui Wang (USTC), Chengyi Wang (USTC), Jiazheng Zhu (USTC) on behalf of the WFST collaboration None TDE-H-He 0.179 1 We triggered optical spectroscopic observations of AT2025alrm using the BINOSPEC spectrograph mounted on the 6.5m Multiple Mirror Telescope (MMT) on 2026-01-14 (MJD 61054). We determine a redshift of z=0.179 from the Balmer absorption lines in the spectrum. The spectrum exhibits a prominent broad emissions at the wavelength of He II λ4686 and NIII λ4640. These spectral characteristics are consistent with those of tidal disruption events (TDE-H+He). 2026TNSCR.476....1W
Spectra
ID Obs-date (UT) Tel / Inst Exp-Time Observer/s Reducer/s Group Spectrum ascii file Spectrum fits file Spec. Type Assoc. Groups End prop. period Remarks
22911 2026-01-14 00:00:00 MMT / BINOSPEC Yibo Wang None tns_2025alrm_2026-01-14_MMT_BINOSPEC_None.txt Object

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